July weather forecast
Granite City, IL

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Weather in July

July is a hot summer month in Granite City, Illinois, with an average temperature varying between 86.2°F (30.1°C) and 68.5°F (20.3°C).

Temperature

The warmest month is July, with an average high-temperature of 86.2°F (30.1°C) and an average low-temperature of 68.5°F (20.3°C).

Heat index

For most parts of July, the heat index is estimated at a very hot 98.6°F (37°C). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.
One should consider that heat index numbers are for shaded settings and light wind. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', provides an understanding of perceived warmth by combining temperature and relative humidity. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Children frequently do not understand the need for recuperation and hydration. Thirst, being a late manifestation of dehydration, underlines the need to hydrate frequently, especially when engaging in prolonged physical exercises.
Perspiring is how the human body naturally cools down, as sweat's evaporation takes away excess heat. With high air temperature and humidity (high heat index) conditions, sweat production is restricted, leading to an amplified perception of heat. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.

Humidity

In July, the average relative humidity in Granite City is 77%.

Rainfall

In Granite City, in July, it is raining for 17.8 days, with typically 3.58" (91mm) of accumulated precipitation. In Granite City, during the entire year, the rain falls for 159.5 days and collects up to 36.06" (916mm) of precipitation.

Snowfall

In Granite City, snow does not fall in April through October.

Daylight

In Granite City, Illinois, the average length of the day in July is 14h and 34min.
On the first day of the month, sunrise is at 5:39 am and sunset at 8:29 pm. On the last day of July, in Granite City, sunrise is at 6:01 am and sunset at 8:12 pm CDT.

Sunshine

The average sunshine in July is 10.4h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: In July, the UV index of 6 transforms into the following advice:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
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Frequently asked questions

What time of the year is the hottest in Granite City?

Granite City's July weather, marked by an average high temperature of 86.2°F (30.1°C) and an average low temperature of 68.5°F (20.3°C), is the warmest in the year.

Is it hot in Granite City during July?

In July, the average high-temperature and low-temperature in Granite City are 86.2°F (30.1°C) and 68.5°F (20.3°C) respectively. The average heat index (a.k.a. 'real feel', 'felt air temperature'), which factors the actual air temperature with the relative humidity, in July is estimated at 98.6°F (37°C).

What is the average humidity in July in Granite City?

The average relative humidity in July in Granite City, Illinois, is 77%.

How much does it rain in Granite City in July?

In July, in Granite City, Illinois, the rain falls for 17.8 days. Throughout July, 3.58" (91mm) of precipitation is accumulated.

When it does not snow in Granite City?

April through October are months without snowfall in Granite City, Illinois.

What is the average length of the day in July in Granite City?

In Granite City, Illinois, the average day length in July is 14h and 34min.

What time are sunrise and sunset in July in Granite City?

In July, on the first day of the month, sunrise is at 5:39 am and sunset at 8:29 pm. On the last day of the month, in Granite City, Illinois, sunrise is at 6:01 am and sunset at 8:12 pm CDT.

How long on average sun shines in July in Granite City?

In Granite City, the average sunshine duration in July is 10.4h.

When is the highest UV index in Granite City?

The months with the highest UV index in Granite City, Illinois, are May through August, with an average maximum UV index of 6.

What is the UV index intensity in July in Granite City?

In July, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in July
Granite City, IL

Average temperature in July - Granite City, IL
  • Average high temperature in July: 86.2°F

The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (37.2°F).

  • Average low temperature in July: 68.5°F

The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).

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Average pressure in July
Granite City, IL

Average pressure in July - Granite City, IL
  • Average pressure in July: 29.97"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in July
Granite City, IL

Average wind speed in July - Granite City, IL
  • Average wind speed in July: 5.5mph

The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest month (with the lowest average wind speed) is July (5.5mph).

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Average humidity in July
Granite City, IL

Average humidity in July - Granite City, IL
  • Average humidity in July: 77%

The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in July
Granite City, IL

Average rainfall in July - Granite City, IL
  • Average rainfall in July: 3.58"

The wettest month (with the highest rainfall) is May (4.21").
The driest month (with the least rainfall) is February (1.93").

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Average rainfall days in July
Granite City, IL

Average rainfall days in July - Granite City, IL
  • Average rainfall days in July: 17.8 days

The months with the highest number of rainy days are May and July (17.8 days).
The month with the least rainy days is January (8.4 days).

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Average snowfall in July
Granite City, IL

Average snowfall in July - Granite City, IL
  • Average snowfall in July: 0"

The month with the highest snowfall is February (2.4").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in July
Granite City, IL

Average snowfall days in July - Granite City, IL
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is January (6.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in July /
Average sunshine in July
Granite City, IL

Average daylight in July / Average sunshine in July - Granite City, IL
  • Average daylight in July: 14h and 4min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in July: 10h and 2min

The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).

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Average sunshine days in July
Granite City, IL

Average sunshine days in July - Granite City, IL
  • Average sunshine days in July: 10.3 days

The month with the most sunshine days is December (18 days).
The month with the least sunshine days is June (10.1 days).

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Average UV index in July
Granite City, IL

Average UV index in July - Granite City, IL
  • Average UV index in July: 6

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in July
Granite City, IL

Average cloud cover in July - Granite City, IL
  • Average cloud cover in July: 29

The month with the most cloud cover is January (Cloud cover 50).
The months with the least cloud cover are June and August (Cloud cover 28).

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Average visibility in July
Granite City, IL

Average visibility in July - Granite City, IL
  • Average visibility in July: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Granite City, Illinois, USA

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